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R-R interval is regular
QRS rate is decreased (rate of junctional rhythm is 50-90/min in infants
and 50-70/min in children)
QRS duration is normal
Sinus P rate is less than the QRS rate with AV dissociation
Retrograde"P wave (axis 270o to 359o) follows some or all QRS complexes
with R-P interval < 0.30 sec
Alternation between sinus rhythm and junctional rhythm is common
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Complete AV block
Supraventricular tachycardia
Premature atrial contraction
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